CN102922759A - Method for confirming machining size of semi-finished product of inside liner according to thickness of inside liner required by tire - Google Patents

Abstract

The invention discloses a method for confirming a machining size of a semi-finished product of an inside liner of a truck tire according to the thickness of an airtight layer in the inside liner actually required by different tires and the thickness of an airtight transition layer in the inside liner actually required by different tires. According to the facts that the nominal rim diameter D<B> of the automobile tire is calculated, a material expansion factor beta of a tire bead of the tire is confirmed according to the fact that whether the tire comprises an inner tube, the specified rim diameter D of the automobile tire is checked, the height B from an arbitrary point of a fractured surface of the tire to a rim touching point designed on a bead toe of the fractured surface of the tire is measured, and the thickness of coated rubber of an all-steel cord of a semi-finished product of carcass cord fabric designed on the tire is confirmed, the design thickness of each point of the airtight layer and the airtight transition layer of the semi-finished product of the inside liner of the tire is calculated finally, and the machining specific sizes of semi-finished products of the airtight layer and the airtight transition layer of the inside liner of the whole tire are obtained. The method for confirming the machining size of the semi-finished product of the inside liner according to the thickness of the inside liner required by the tire can effectively guarantee uniformity of distribution of inner wall material of the tire, improve pressure maintaining performance of the tire, and lower manufacturing material cost of the tire.

Description

Determine the method for inner liner semi-finished product processing dimension according to the required inner liner thickness of tire

Technical field

This method for designing that relates to a kind of tyre element is particularly determined the method for tire liner semi-finished product processing dimension according to the required inner liner thickness of tire.

Background technology

As shown in Figure 1, tire is divided into crown section, tire shoulder section, sidewall section, and the each several part such as toe mouth section, inner liner is positioned at the innermost layer of tire, formed by inner liner 1 and airtight transition zone 2, be the friction that reduces between carcass and the inner tube of a tyre in its effect on the inner liner, prevent that air and moisture are penetrated into carcass inside.For tubeless tyre, inner liner also has the effect that keeps pressure in the tire cavity.Their thickness is respectively by h _Gas, h _CrossRepresent that because airtight transition zone links to each other with the carcass ply all-steel cord, therefore the actual tire design carcass ply all-steel cord that is covered with covers glue-line on airtight transition zone, that is to say in fact h _GasThickness comprise that also tire design carcass ply all-steel cord covers the thickness of glue-line, therefore when actual design tire liner semi-finished product, the thickness h that the actual (real) thickness of airtight transition zone need to cover carcass ply rerolled steel silk cord glue-line is removed.The flat rod design of former cross-ply multiple field is continued to use at present full steel wire heavy load automobile radial tire inner liner design mostly, allow material be uniformly distributed in inner liner half storey product, it also is the consistency of thickness of the half-finished inner liner of inner liner and transition zone various piece, when this just causes in being installed in tire, if guarantee wheel crown part inner liner thickness, then cause tire sidepiece to toe port part material to be wasted in a large number.If guarantee the tire sidepiece to toe port part inner liner thickness, then crown thickness will be fallen very much and be caused tyre air tightness to reduce.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of method of definite truck tyre semi-finished product processing dimension, the semi-finished product that the method processes can guarantee the consistency of thickness of tire inner liner everywhere when being installed on inner layer of tire, guarantee air-tightness, avoid the waste of material.

The object of the present invention is achieved like this, a kind ofly determines to it is characterized in that the method for inner liner semi-finished product processing dimension carrying out as follows according to the required inner liner thickness of tire:

A, determine the thickness h of inner liner (1) and airtight transition zone (2) in the actual required inner liner of tire _Gas, h _CrossAnd tire design carcass ply rerolled steel silk cord covers the thickness h of glue-line;

B, according to the tire of different size, determine automobile tire rim nominal diameter D _B, D _B=diameter of tyres value made in Great Britain R*25.4mm; Then whether contain the inner tube of a tyre according to tire and determine tire pin material coefficient of expansion β, it is 1.06 that inner tube of a tyre β value is wherein arranged, and tubeless β value is 1.1, then with D _BWith β substitution formula Ф=D _B/ β obtains the Ф value;

C, basis " Chinese tyre rim valve cock " standard queries different size automobile tire rim nominal diameter D;

D, measure tire section arbitrfary point to tire section toe mouth design wheel rim and the chalaza height B;

E, with h obtained above _GasAnd h _Cross, Ф value, D value, B value, h value following two formula of substitution respectively:

Calculate the actual thickness H that should design of this inner liner inner liner of tire section and transition zone semi-finished product _GasAnd H _CrossThereby, draw the concrete size of inner liner and transition zone semi-finished product processing in the whole tire liner;

λ wherein: for tire design cord pre-stretching, be empirical coefficient, value 1.018.

Adopt technique scheme, draw the concrete thickness H of the every bit of the half-finished inner liner of tire liner and airtight transition zone _GasAnd H _CrossValue, thereby draw whole half-finished concrete size, when such semi-finished product make up after cure in inner layer of tire in moulding, can guarantee the inner liner consistency of thickness of crown section, tire shoulder section, sidewall section, toe mouth section, guarantee air-tightness, promote the tire pressure maintaining performance, do not cause the waste of material, reduce the tire manufacturing cost.

Beneficial effect of the present invention: the present invention effectively guarantees tire inner wall distribution of material uniformity, promotes the tire pressure maintaining performance, reduces tire manufactured materials cost.

Figure of description:

Fig. 1 is 11R22.5 tubeless tyre sectional drawing;

Fig. 2 is 11R22.5 tubeless tyre inner liner semi-finished product structure schematic diagram;

Fig. 3 is 10.00R20 tubed tyre sectional drawing;

Fig. 4 is 10.00R20 tubed tyre inner liner semi-finished product structure schematic diagram.

The specific embodiment

The below take 11R22.5 tubeless tyre and 10.00R20 tubed tyre as example, does specific description to the present invention respectively:

Embodiment 1:

This embodiment is take specification as the 11R22.5 tubeless tyre as example,

A, the actual required inner liner thickness h of this tire _GasBe 2mm, h _CrossBe 2mm, it is 0.8mm that carcass ply rerolled steel silk cord covers glue thickness h value;

B, determine 11R22.5 automobiles without inner tubes tyre rim nominal diameter D _B,

D _B=22.5*25.4=571.5mm；

Then whether contain the inner tube of a tyre according to tire and determine tire pin material coefficient of expansion β,

It is 1.06 that inner tube of a tyre β value is wherein arranged, and tubeless β value is 1.1,

11R22.5 be tubeless tyre, get β=1.1

Then with D _BWith β substitution formula

Ф=D _B/β=571.5/1.1=519.5mm

C, this specification automobile tire rim nominal diameter of basis " Chinese tyre rim valve cock " standard queries D are 571.5mm;

D, measure tire section inwall crown central point to tire section toe mouth design wheel rim and chalaza height B=205.26mm (as shown in Figure 1);

E, with h obtained above _GasAnd h _Cross, Ф value, D value, B value, h value substitution formula respectively:

Calculate the actual thickness H that should design of this tyre crown central point inner liner 1 and airtight transition zone 2 semi-finished product _Gas≈ 3.8mm, H _Cross≈ 3.0mm

λ wherein: for tire design cord pre-stretching, be empirical coefficient, value 1.018.

Equally, measure on tire section inwall tire shoulder, sidewall and the cord other each the point to tire section toe mouth chalaza height B value; Calculate the actual thickness H gas that should design of these tire inner wall inner liners 1 and airtight transition zone 2 half storey product and the H value of mistake, result of calculation sees Table 1 and table 2:

The inner liner semi-finished product design size H of table 1 11R22.5 tubeless tyre inner liner _Gas

The airtight transition zone semi-finished product design size H of table 2 11R22.5 tubeless tyre inner liner _Cross

Draw whole inner liner semi-finished product design size according to the real thickness in the border of each point at last, go out the inner liner semi-finished product as shown in Figure 2 according to this dimensioned: half-finished quality that this half-finished mass ratio uses at present on the market reduces 0.4kg, save material, reduced manufacturing cost.Guaranteed again simultaneously air-tightness, when these semi-finished product make up after cure in inner layer of tire in moulding, basically identical through the thickness of measuring inner liner everywhere.

Embodiment 2:

This embodiment is take specification as the 10.00R20 tubed tyre as example,

A, the actual required inner liner 1 of this tire and airtight transition zone 2 thickness h _GasBe 1.5mm, h _CrossBe 1.5mm, it is 0.6mm that carcass ply rerolled steel silk cord covers glue thickness h value;

B, determine that 10.00R20 has inner tube of a tyre automobile tire rim nominal diameter D _B,

D _B=20*25.4=508mm；

Then whether contain the inner tube of a tyre according to tire and determine tire pin material coefficient of expansion β,

It is 1.06 that inner tube of a tyre β value is wherein arranged, and tubeless β value is 1.1,

10.00R20 be tubed tyre, get β=1.06

Then with D _BWith β substitution formula

Ф=D _B/β=508/1.06=479.2mm

C, this specification automobile tire rim nominal diameter of basis " Chinese tyre rim valve cock " standard queries D are 514.4mm;

D, measure tire section inwall crown center to tire section toe mouth design wheel rim and chalaza height B=236.75mm;

E, with h obtained above _GasAnd h _Cross, Ф value, D value, B value, h value substitution formula respectively:

Calculate the actual thickness H that should design of this tyre crown central point inner liner 1 and inner liner transition zone glue 2 semi-finished product _Gas≈ 3.1mm, H _Cross≈ 2.6mm

λ wherein: for tire design cord pre-stretching, be empirical coefficient, value 1.018.

Equally, measure on tire section inwall tire shoulder, sidewall and the cord other each the point to tire section toe mouth chalaza height B value; Calculate the actual thickness H that should design of these tire inner wall inner liners 1 and airtight transition zone 2 half storey product _GasAnd H _CrossValue, result of calculation see Table 3 and table 4:

The inner liner semi-finished product design size H of table 310.00R20 tubed tyre inner liner _Gas

The airtight transition zone semi-finished product design size H of table 410.00R20 tubed tyre inner liner _Cross

Actual (real) thickness according to each point draws whole inner liner semi-finished product design size at last, go out the inner liner semi-finished product as shown in Figure 3 according to this dimensioned: half-finished quality that this half-finished mass ratio uses at present on the market reduces 0.466kg, save material, reduced manufacturing cost.Guaranteed again simultaneously air-tightness, when these semi-finished product make up after cure in inner layer of tire in moulding, basically identical through the thickness of measuring inner liner everywhere.

The present invention is not limited to the tire of two kinds of specifications of specific embodiment, according to method of the present invention, can calculate equally the half-finished processing dimension of inner liner of the automobile tire of other specifications and models.The inner liner that goes out according to this dimensioned can guarantee the uniformity of thickness everywhere when being contained in inner layer of tire.

Claims (1)

1. determine to it is characterized in that the method for inner liner semi-finished product processing dimension carrying out as follows according to the required inner liner thickness of tire for one kind:

A, determine the thickness h of inner liner (1) and airtight transition zone (2) in the actual required inner liner of tire _Gas, h _CrossAnd tire design carcass ply rerolled steel silk cord covers the thickness h of glue-line;

B, according to the tire of different size, determine automobile tire rim nominal diameter D _B, D _B=diameter of tyres value made in Great Britain R*25.4mm; Then whether contain the inner tube of a tyre according to tire and determine tire pin material coefficient of expansion β, it is 1.06 that inner tube of a tyre β value is wherein arranged, and tubeless β value is 1.1, then with D _BWith β substitution formula Ф=D _B/ β obtains the Ф value;

C, basis " Chinese tyre rim valve cock " standard queries different size automobile tire rim nominal diameter D;

D, measure tire section arbitrfary point to tire section toe mouth design wheel rim and the chalaza height B;

E, with h obtained above _GasAnd h _Cross, Ф value, D value, B value, h value following two formula of substitution respectively:

Calculate the actual thickness H that should design of this inner liner inner liner of tire section and transition zone semi-finished product _GasAnd H _CrossThereby, draw the concrete size of inner liner and transition zone semi-finished product processing in the whole tire liner;

λ wherein: for tire design cord pre-stretching, be empirical coefficient, value 1.018.

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